TY  - RPRT
TI  - Closing volume in normal pregnancy.
AU  - I F Russell
AU  - W A Chambers
PY  - 1981
DO  - 10.1093/bja/53.10.1043
UR  - https://pubmed.ncbi.nlm.nih.gov/7295449/
ID  - 7295449
ER  -